[gcc r14-10854] testsuite, jit: fix test-error-pr63969-missing-driver.c

[David Malcolm via Gcc-cvs]

https://gcc.gnu.org/g:771873f0a95162236ab6a237db1b142a39b2f9b9

commit r14-10854-g771873f0a95162236ab6a237db1b142a39b2f9b9
Author: David Malcolm <dmalc...@redhat.com>
Date:   Wed Oct 30 16:11:40 2024 -0400

    testsuite, jit: fix test-error-pr63969-missing-driver.c
    
    jit.dg/test-error-pr63969-missing-driver.c tries to break PATH and
    verify that an error is generated when using an external driver.
    
    However it does this by unsetting PATH, and so the test could
    accidentally find the driver if the system supplies a default and the
    driver happens to be installed in that path (reported as rhbz#2318021).
    
    Fix the test by instead setting PATH to a bogus value.
    
    gcc/testsuite/ChangeLog:
            * jit.dg/test-error-pr63969-missing-driver.c (create_code): When
            breaking PATH, use setenv with a bogus value, rather than
            unsetenv, in case the system uses a default path that contains
            the driver binary.
    
    Signed-off-by: David Malcolm <dmalc...@redhat.com>
    (cherry picked from commit f8dcb559e615dbb4557a23363f9532a3544a7241)
    Signed-off-by: David Malcolm <dmalc...@redhat.com>

Diff:
---
 gcc/testsuite/jit.dg/test-error-pr63969-missing-driver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/jit.dg/test-error-pr63969-missing-driver.c 
b/gcc/testsuite/jit.dg/test-error-pr63969-missing-driver.c
index 733522310deb..152e236443cc 100644
--- a/gcc/testsuite/jit.dg/test-error-pr63969-missing-driver.c
+++ b/gcc/testsuite/jit.dg/test-error-pr63969-missing-driver.c
@@ -28,7 +28,7 @@ create_code (gcc_jit_context *ctxt, void *user_data)
   /* Break PATH, so that the driver can't be found
      by gcc::jit::playback::context::compile ()
      within gcc_jit_context_compile.  */
-  unsetenv ("PATH");
+  setenv ("PATH", "/this/is/not/a/valid/path", 1);
 }
 
 void